| 摘要 |
A cylindrical metal disc is optimized to spin/roll on a base for an extended length of time, and as the angle of inclination of the disc decreases to zero, a tone emitted by the spinning/rolling of the disc rises in pitch towards infinity. To optimize the spinning/rolling time, the radius-to-height aspect ratio of the disc is approximately three, the upper surface of the base and the lower edge of the disc are smooth and hard to enable the disc to spin/roll for an extended length of time, and the base has three legs and is solidly constructed to minimize energy losses due to vibration. The upper surface of the base is concave to prevent the disc from wandering as it spins/rolls. The top of the disc is tessellated with tiles having effectively random optic orientations to produce the appearance of a cloud of sparkling lights in the vicinity of the top surface of the disc as it spins/rolls. |
